From 524f69acc59ac20955700c65d358490c383aa3a2 Mon Sep 17 00:00:00 2001
From: Daniel Silverstone <dsilvers@digital-scurf.org>
Date: Sun, 4 Nov 2012 16:52:40 +0000
Subject: Support generation of dep files

---
 src/nsgenbind-ast.c | 12 ++++++++++++
 src/nsgenbind.c     | 41 ++++++++++++++++++++++++++++++++++++++---
 src/options.h       |  2 ++
 3 files changed, 52 insertions(+), 3 deletions(-)

diff --git a/src/nsgenbind-ast.c b/src/nsgenbind-ast.c
index c14f0df..52febaa 100644
--- a/src/nsgenbind-ast.c
+++ b/src/nsgenbind-ast.c
@@ -299,6 +299,10 @@ FILE *genbindopen(const char *filename)
 			}
 			prevfilepath = strndup(filename,fulllen);
 		}
+		if (options->depfilehandle != NULL) {
+			fprintf(options->depfilehandle, " \\\n\t%s",
+				filename);
+		}
 		return genfile;
 	}
 
@@ -315,6 +319,10 @@ FILE *genbindopen(const char *filename)
 			if (options->verbose) {
 				printf("Opened Genbind file %s\n", fullname);
 			}
+			if (options->depfilehandle != NULL) {
+				fprintf(options->depfilehandle, " \\\n\t%s",
+					fullname);
+			}
 			free(fullname);
 			return genfile;
 		}
@@ -329,6 +337,10 @@ FILE *genbindopen(const char *filename)
 		genfile = fopen(fullname, "r");
 		if ((genfile != NULL) && options->verbose) {
 			printf("Opend Genbind file %s\n", fullname);
+			if (options->depfilehandle != NULL) {
+				fprintf(options->depfilehandle, " \\\n\t%s",
+					fullname);
+			}
 		}
 
 		free(fullname);
diff --git a/src/nsgenbind.c b/src/nsgenbind.c
index 14854ad..66292a9 100644
--- a/src/nsgenbind.c
+++ b/src/nsgenbind.c
@@ -30,7 +30,7 @@ static struct options* process_cmdline(int argc, char **argv)
 		return NULL;
 	}
 
-	while ((opt = getopt(argc, argv, "vdI:o:")) != -1) {
+	while ((opt = getopt(argc, argv, "vDd:I:o:")) != -1) {
 		switch (opt) {
 		case 'I':
 			options->idlpath = strdup(optarg);
@@ -40,17 +40,21 @@ static struct options* process_cmdline(int argc, char **argv)
 			options->outfilename = strdup(optarg);
 			break;
 
+		case 'd':
+			options->depfilename = strdup(optarg);
+			break;
+
 		case 'v':
 			options->verbose = true;
 			break;
 
-		case 'd':
+		case 'D':
 			options->debug = true;
 			break;
 
 		default: /* '?' */
 			fprintf(stderr, 
-			     "Usage: %s [-I idlpath] [-o filename] inputfile\n",
+			     "Usage: %s [-d depfilename] [-I idlpath] [-o filename] inputfile\n",
 				argv[0]);
 			free(options);
 			return NULL;
@@ -87,6 +91,32 @@ int main(int argc, char **argv)
 		return 2;
 	}
 
+	if (options->depfilename != NULL &&
+	    options->outfilename == NULL) {
+		fprintf(stderr,
+			"Error: output to stdout with dep generation would fail\n");
+		return 3;
+	}
+
+	if (options->depfilename != NULL &&
+	    options->infilename == NULL) {
+		fprintf(stderr,
+			"Error: input from stdin with dep generation would fail\n");
+		return 3;
+	}
+
+	if (options->depfilename != NULL) {
+		options->depfilehandle = fopen(options->depfilename, "w");
+		if (options->depfilehandle == NULL) {
+			fprintf(stderr,
+				"Error: unable to open dep file\n");
+			return 4;
+		}
+		fprintf(options->depfilehandle,
+			"%s %s :", options->depfilename,
+			options->outfilename);
+	}
+
 	res = genbind_parsefile(options->infilename, &genbind_root);
 	if (res != 0) {
 		fprintf(stderr, "Error: parse failed with code %d\n", res);
@@ -104,5 +134,10 @@ int main(int argc, char **argv)
 		return res;
 	}
 
+	if (options->depfilehandle != NULL) {
+		fputc('\n', options->depfilehandle);
+		fclose(options->depfilehandle);
+	}
+
 	return 0;
 } 
diff --git a/src/options.h b/src/options.h
index 696a907..ba43084 100644
--- a/src/options.h
+++ b/src/options.h
@@ -12,6 +12,8 @@
 struct options {
 	char *outfilename;
 	char *infilename;
+	char *depfilename;
+	FILE *depfilehandle;
 	char *idlpath;
 	bool verbose;
 	bool debug;
-- 
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